Air Injection Reaction Pipe Corrosion: Overview

Bulletin No. T 84-85
File In Group 6E
Number 9
Date July '84


SUBJECT: AIR INJECTION REACTION (A.I.R.) PIPE CORROSION

MODELS AFFECTED: 1982-1983 DEVILLE, BROUGHAM, ELDORADO AND SEVILLE

Some 1982-1983 Deville, Brougham, Eldorado and Seville vehicles equipped with the HT4100 engine may experience a condition of A.I.R. pipe corrosion. In order to alleviate this corrosion potential, a mid-1983 model year production change to stainless steel pipes was initiated. This change was effective after the following 1983 VIN breakpoints:

A.I.R. Pipe to Left A.I.R. Pipe to Right
Exhaust Manifold Exhaust Manifold
Model (P/N 1627722) (PIN 1627723)

Deville/Brougham (C Series) 200639 183062
Eldorado (E Series) 636474 629155
Seville (K Series) 816762 812477

On-car service procedures for all A.I.R. system pipes (including the two mentioned above) were inadvertently not published in the 1982-1984 Service Information Manuals. If replacement of any A.I.R. system pipe is required, refer to the on-car service procedures and warranty information listed below:
WARRANTY INFORMATION Hours
Labor 82-83C 82-84
Operation 84D E/K

A.I.R. Pipe - Check Valve to Exhaust Manifold (Right) J6133 1.3 **1.1
A.I.R. Pipe - Check Valve to Exhaust Manifold (Left) J6134 *1.5 **1.1
A.I.R. Pipe - Check Valve to Exhaust Manifold (Both) J6135 *2.7 **2.0
A.I.R. Pipe - Catalytic Converter (Upper) J6102 0.4 -
A.I.R. Pipe - Catalytic Converter (Lower) J6103 0.3 -
A.I.R. Pipe - Catalytic Converter (One Piece) J6108 - 0.4
A.I.R. Check Valve J6086 0.2 0.2
*Increased Time
**Decreased Time

The A.I.R. pipe is a 5 year/50,000 mile emission warranty item and should be replaced without cost to our customers during the 5 year/50,000 mile period.

82-83 C, E, K; 84 D, E, K ON-CAR SERVICE PROCEDURES